Should I see a dr?

Pregnant and been feeling really down at the moment, have no motivation to see friends or family, lost interest in tv, sex, even my partner on some days. I fear the future of being a single mom, I fear I won't be able to cope, but also fear how the other half would react to a break up as he's more engaged and wanting to be here with me and the child than I am :/
I took a test online for depression and came up as maybe being mild depression... Just don't know what to do or who to turn to anymore